WO2003089980A1 - Ensemble panneau lumineux destine a un appareil d'affichage a cristaux liquides - Google Patents
Ensemble panneau lumineux destine a un appareil d'affichage a cristaux liquides Download PDFInfo
- Publication number
- WO2003089980A1 WO2003089980A1 PCT/KR2003/000348 KR0300348W WO03089980A1 WO 2003089980 A1 WO2003089980 A1 WO 2003089980A1 KR 0300348 W KR0300348 W KR 0300348W WO 03089980 A1 WO03089980 A1 WO 03089980A1
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- WIPO (PCT)
- Prior art keywords
- light
- display area
- reflecting
- lcd panel
- guide plate
- Prior art date
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Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
- G02B6/0055—Reflecting element, sheet or layer
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/0063—Means for improving the coupling-out of light from the light guide for extracting light out both the major surfaces of the light guide
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
- G02B6/0045—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it by shaping at least a portion of the light guide
- G02B6/0046—Tapered light guide, e.g. wedge-shaped light guide
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/0058—Means for improving the coupling-out of light from the light guide varying in density, size, shape or depth along the light guide
- G02B6/0061—Means for improving the coupling-out of light from the light guide varying in density, size, shape or depth along the light guide to provide homogeneous light output intensity
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0075—Arrangements of multiple light guides
- G02B6/0076—Stacked arrangements of multiple light guides of the same or different cross-sectional area
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/133342—Constructional arrangements; Manufacturing methods for double-sided displays
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
- G02F1/133607—Direct backlight including a specially adapted diffusing, scattering or light controlling members the light controlling member including light directing or refracting elements, e.g. prisms or lenses
Definitions
- the present invention relates to a backlight assembly and an LCD (Liquid
- an LCD apparatus displays an image using a liquid crystal in which a light transmittance varies with an intensity of an electric field.
- the LCD apparatus has a flat shape having a thickness from a number of millimeters to dozens of millimeters including a liquid crystal layer that a thickness is no more than a number of micrometers.
- the LCD apparatus is widely used as a communication device such as a cellular phone and as a display device such as a mobile computer or a desktop computer and so on.
- the LCD apparatus employing a method that displays the image in only one direction had been developed to reduce a thickness and a volume thereof. Recently, the LCD apparatus has been developed to display a same image or a different image in two directions.
- the LCD apparatus includes a reflecting plate for dividing the light into the two directions and an LCD panel having a polarizing filter, a pixel electrode, a hquid crystal, two electrodes facing each other, a glass substrate, a polarizing plate.
- the LCD apparatus further includes a flat type light emitting part for emitting the light in opposite two directions and a display cell disposed on both surfaces of the light emitting part.
- the LCD apparatus further includes a backlight assembly, a first LCD panel and a second LCD panel disposed on both surfaces of the backlight assembly, respectively.
- the LCD apparatus divides the light so as to display the image in the opposite two directions, however, the LCD apparatus cannot control the intensity of the light divided into the opposite two directions.
- a cellular phone having an external display device and an internal display device will be described.
- a cellular phone of model "A” has an external display device having a brightness lower than that of an internal display device thereof, most of lights emitted from a light source are provided to the internal display device.
- a cellular phone of model "B” has an external display device having a brightness higher than that of an internal display device thereof, most of lights emitted from the light source are provided to the external display device.
- the LCD apparatus may divide the light into the opposite two directions, however, the LCD apparatus may not variably control the amount of the light divided into the opposite two directions according to an external situation.
- the present invention provides a backlight assembly capable of dividing a light into two lights having a different brightness and supplying the divided lights in two directions.
- the present invention also provides an LCD having a backlight assembly capable of dividing a light into two lights having a different brightness and displaying images same or different to each other in two directions.
- a backlight assembly for emitting a light in two directions, comprising: a Hght guide plate having a light incident surface for changing a first light input from between a first display area and a second display area into a second light, a first Ught emitting surface for emitting a portion of the second hght to the first display area as a third light and a second Ught emitting surface for emitting a remained portion of the second Ught to the second display area as a fourth Ught, the light guide plate being disposed between the first and second display areas; and a brightness control part for reflecting a portion of the fourth Ught to the first display area and transmitting a remained portion of the fourth light to the second display area, so that a first brightness at the first display area and a second brightness at the second display area have a predetermined brightness ratio, respectively.
- a backUght assembly for emitting a light in two directions, comprising: a lamp assembly disposed between a first display area and a second display area, for providing a first Ught and a fifth Ughts between the first and second display areas, the first and fifth Ughts having a path different to each other; a first light guide plate having a first Ught incident surface for changing the first light into a second light, a first surface for reflecting a portion of the second light to the first display area as a third light and a second surface for emitting the third Ught, the second surface being faced to the first surface; a second Ught guide plate having a second Ught incident surface for changing the fifth light into a sixth light, a third surface for reflecting a portion of the sixth Ught to the second display area as a seventh Ught and a fourth surface for emitting the seventh Ught, the fourth surface being faced to the third surface; and a reflecting plate
- an LCD apparatus comprising: a lamp assembly disposed between a first display area and a second display area, for providing a first Ught between the first and second display areas; a Ught guide plate having a Ught incident surface for changing the first Ught into a second Ught, a first light emitting surface for emitting a portion of the second light to the first display area as a third Ught and a second light emitting surface for emitting a remained portion of the second Ught to the second display area as a fourth Ught; a brightness control part for reflecting a portion of the fourth light to the first display area and transmitting a remained portion of the fourth Ught to the second display area, so that a first brightness at the first display area and a second brightness at the second display area have a predetermined brightness ratio, respectively; a first LCD panel assembly for changing the portions of the third and fourth lights into a first display light having an image information; and a second LCD panel assembly
- an LCD apparatus comprising: a lamp assembly disposed between a first display area and a second display area, for providing a first light and a fifth lights between the first and second display areas, the first and fifth Ughts having a path different to each other; a first Ught guide plate having a first Ught incident surface for changing the first into a second Ught, a first surface for reflecting a portion of the second light to the first display area as a third light and transmitting a remained portion of the second light to the second display area as a fourth Ught, and a second surface facing to the first surface, for emitting the third Ught; a second light guide plate having a second light incident surface for changing the fifth Ught into a sixth light, a third surface for reflecting a portion of the sixth light to the second display area as a seventh light and transmitting a remained portion of the sixth light to the first display area as a eighth Ught, and a fourth surface
- the light from the Ught source is divided into a light for the first display area and a light for the second display area of the LCD apparatus.
- the portion of the Ught provided to the second display area is reflected to the first display area and the remained portion of the Ught provided to the second display area is transmitted, thereby controUing the brightness ratio at the first and second display areas.
- it is able to display a required image in the two directions.
- FIG. 1 is a schematic diagram showing a backUght assembly for emitting a light in two directions according to a first embodiment of the present invention
- FIG. 2 is a schematic diagram showing a Ught reflecting pattern disposed on a light guide plate of the backUght assembly shown in FIG. 1;
- FIG. 3 is a schematic diagram showing a size and an arrangement of the light reflecting pattern shown in FIG. 2;
- FIG. 4 is a schematic diagram showing a backlight assembly for emitting a light in two directions according to a second embodiment of the present invention
- FIG. 5 is a graph showing brightness at a first display area and a second display area of the backUght assembly according to the present invention.
- FIG. 6 is a schematic diagram showing a backlight assembly for emitting a light in two directions according to a third embodiment of the present invention.
- FIG. 7 is a schematic diagram showing a backlight assembly for emitting a Ught in two directions according to a fourth embodiment of the present invention.
- FIG. 8 is a schematic diagram showing a light reflecting pattern disposed on a light guide plate shown in FIG. 7;
- FIG. 9 is a schematic diagram showing optical sheets disposed on the backUght assembly shown in FIG. 8;
- FIG. 10 is a schematic diagram showing a backlight assembly for emitting a light in two directions according to a fifth embodiment of the present invention.
- FIG. 11 is a graph showing a size of the light reflecting pattern shown in FIG. 10;
- FIG. 12 is a graph showing differences of the size between a first light reflecting pad and a second Ught reflecting pad shown in FIG. 10;
- FIG. 13 is a schematic diagram showing a backlight assembly for emitting a Ught in two directions according to a sixth embodiment of the present invention
- FIG. 14 is a schematic diagram showing optical sheets disposed on the backlight assembly shown in FIG. 13;
- FIG. 15 is a schematic diagram showing a backlight assembly for emitting a Ught in two directions according to a seventh embodiment of the present invention.
- FIG. 16 is a graph showing a size of the Ught reflecting pattern shown in FIG. 15;
- FIG. 17 is a graph showing differences of the size between a first light reflecting pad and a second Ught reflecting pad shown in FIG. 15;
- FIG. 18 is a schematic diagram showing a backUght assembly for emitting a light in two directions according to a eighth embodiment of the present invention.
- FIG. 19 is a schematic diagram showing an LCD apparatus according to a first embodiment of the present invention.
- FIGS. 20 to 23 are schematic diagrams showing sizes and locations of a first
- FIGS. 24 and 25 are schematic diagrams showing driving methods of the first and second LCD panel assembUes shown in FIG. 19;
- FIG. 26 is a schematic diagram showing an LCD apparatus according to a second embodiment of the present invention.
- FIG. 27 is a schematic diagram showing sizes and locations of a first LCD panel assembly and a second LCD panel assembly shown in FIG.26.
- FIG. 1 is a schematic diagram showing a backUght assembly for emitting a
- a backlight assembly 500 includes a Ught guide plate 300 and a brightness control member 400.
- the light guide plate 300 has a rectangular parallelepiped shape and is disposed between a first display area 100 and a second display area 200.
- the Ught guide plate 300 includes four side surfaces including a light incident surface 310, a first light emitting surface 320 and a second Ught emitting surface 330.
- the first and second light emitting surfaces 320 and 330 are facing to each other and have a rectangular shape, respectively.
- the first Ught emitting surface 320 is connected to the second light emitting surface 320 by means of four side surfaces including the Ught incident surface 310, which are perpendicular to the first and second Ught emitting surfaces 320 and 330.
- the light incident surface 310 of the Ught guide plate 300 receives a first Ught 305 from an external.
- the first Ught 305 is emitted from a point light source such as a Ught emitting diode or a linear Ught source such as a CCFL.
- the Ught source that emits the first Ught has been indicated by a reference numeral "301".
- the first Ught 305 is changed into a second Ught 315 during passing through the Ught incident surface 310 having a medium different to an air between the Ught source 301 and the Ught incident surface 310.
- the second Ught 315 is reflected inside the Ught guide plate 300 according to the refraction's law and emitted from the light guide plate 300 to two directions.
- a light corresponding to a portion of the second light 315 is emitted from the first light surface 320 to the first display area 100.
- the Ught emitted from the first Ught surface 320 to the first display area 100 is defined as a third light 325.
- a Ught corresponding to a remained portion of the second light 315 is emitted from the second light emitting surface 330 to the second display area 200.
- the Ught emitted from the second Ught emitting surface 330 and provided to the second display area 200 is defined as a fourth light 335.
- the light guide plate 300 has to be re-designed and re-manufactured.
- the brightness control member 400 controls the first and second brightness at the first and second display areas 100 and 200.
- the brightness control member 400 reflects a portion of the fourth Ught 335 to the first display area 100 and transmits a remained portion of the fourth Ught 335 to the second display area 200.
- the brightness control member 400 has a sheet shape or a plate shape comprised of a PET (Polyethylene Terephthalate) resin.
- the brightness control member 400 may be fabricated to reflect the Ught of about 80% of the fourth Ught 335 and transmit the Ught of about 20% of the fourth Ught 335 or to reflect the Ught of about 20% of the fourth light 335 and transmit the Ught of about 80% of the fourth Ught 335.
- the brightness control member 400 may be fabricated using a material for partially reflecting and transmitting a Ught.
- FIG.2 is a schematic diagram showing a light reflecting pattern disposed on a light guide plate of the backUght assembly shown in FIG. 1 and
- FIG. 3 is a scJhematic diagram showing a size and an arrangement of the light reflecting pattern shown in FIG.2.
- the Ught guide plate 300 includes a plurality of light reflecting pads 331 disposed on the second light emitting surface 330 facing the brightness control member 400.
- the light reflecting pads 331 reflect a portion of the second light 315, which is in contact with the second Ught emitting surface 330, to the first Ught emitting surface 320.
- the light reflecting pads 331 are disposed on the second light emitting surface 320 in a matrix configuration.
- the light reflecting pads 331 are formed on the second Ught emitting surface 320 using a silk screen method. Plane Sizes of the light reflecting pads 331 become larger according as the light reflecting pads 331 are spaced more apart from the light incident surface 310. Changing the plane sizes of the light reflecting pads 331 is for uniformly maintaining a reflecting amount of the fourth Ught 335 by the Ught reflecting pads 331 disposed over the second Ught emitting surface 330. As shown in FIG. 2, the first light emitting surface 320 is parallel to the second light emitting surface 330.
- FIG. 4 is a schematic diagram showing a backlight assembly for emitting a light in two directions according to a second embodiment of the present invention.
- FIG. 5 is a graph showing brightness at a first display area and a second display area of the backlight assembly according to the present invention.
- FIG. 6 is a schematic diagram showing a backlight assembly for emitting a light in two directions according to a third embodiment of the present invention.
- the first Ught emitting surface 320 is not paraUel to the second Ught emitting surface 330.
- a thickness between the first and second light emitting surfaces 320 and 322 is thickest at the light incident surface 310 and gradually becomes thinner according as the first and second Ught emitting surfaces 320 and 322 become more distant from the light incident surface 310.
- the first brightness at the first display area 100 is higher than the second brightness at the second display area 200.
- the brightness control member 400 has to be controUed to have a light reflectance higher than a light transmittance with respect to the fourth light 335.
- the brightness control member 400 has to be controlled to have a Ught transmittance higher than a Ught reflectance with respect to the fourth Ught 335.
- an optical sheet 340 may be disposed on the first Ught emitting surface 320 of the Ught guide plate 300.
- the optical sheet 340 includes a diffusion sheet 342 and a prism sheet 344.
- the diffusion sheet 342 diffuses the third Ught 325 and the portion of the fourth Ught 355 reflected from the brightness control member 400 to provide a Ught having a uniform brightness to the first display area 100.
- the prism sheet 344 disposed on the diffusion sheet 342 controls a direction of the Ught emitted through the diffusion sheet 342 to provide the light having an improved visual angle.
- the prism sheet 344 includes a body portion 344a having a plate shape and a brightness enhancing portion 344b for enhancing the brightness, which is disposed on a surface facing to the first Ught emitting surface 320.
- the brightness enhancing portion 344b is successively disposed on the body portion 344a and protruded from the body portion 344a to have a triangle shape in section.
- FIG. 7 is a schematic diagram showing a backlight assembly for emitting a light in two directions according to a fourth embodiment of the present invention.
- a backlight assembly 1000 includes a first light guide plate 700, a second Ught guide plate 800, a lamp assembly 940 and a brightness control member 900.
- the lamp assembly 940 includes a lamp 950 and a lamp reflector 930.
- the lamp 950 may include an LED as a point Ught source or a CCFL as a linear Ught source.
- a Ught incident to the first Ught guide plate 700 from the Ught source is defined as a first Ught 952 and a light incident to the second light guide plate 800 from the Ught source is defined as a fifth light 956.
- the lamp reflector 930 reflects the Ught emitted from the lamp 950 in a radial shape to provide the Ught to the directions to which the first and fifth Ughts 952 and 956 are provided.
- the lamp reflector 930 includes first and second side surfaces 932 and 934 and a connecting side surface 936 that connects the first side surface 932 to the second side surface 934.
- the first and second side surfaces 932 and 934 and the connecting side surface 936 have a reflectance higher than that of outer surfaces thereof.
- the first and second light guide plates 700 and 800 are disposed between the first and second side surfaces 932 and 934.
- the first light guide plate 700 has a rectangular parallelepiped shape and is disposed between a first display area 100 and a second display area 200.
- the first light guide plate 700 includes four side surfaces including a first light incident surface 710, a first surface 720 and a second surface 730.
- the first and second surfaces 720 and 730 have the rectangular paraUelepiped shape, respectively.
- the first and second surfaces 720 and 730 are connected to each other by means of the four side surfaces.
- the first light incident surface 710 of the first light guide plate 700 receives the first light 952 from the lamp 950.
- the first Ught 952 is changed into a second light 953 during passing through the first Ught incident surface 710.
- the first surface 720 reflects a portion of the second Ught 953 satisfied with a reflection condition according to the refraction's law to the first display area 100.
- a remained portion of the second Ught 953 not satisfied with the reflection condition of the refraction's law is leaked to the second display area 200.
- the portion of the second light 953 reflected to the first display area 100 is defined as a third Ught 954 and the remained portion of the second light 953 transmitted to the second display area 200 is defined as a fourth Ught 955.
- the second Ught guide plate 800 has a rectangular parallelepiped shape.
- the second light guide plate 800 is disposed between a first display area 100 and a second display area 200 and adjacent to the first surface 720 of the light guide plate 700.
- the first and second Ught guide plates 700 and 800 are paraUel to each other.
- the second light guide plate 800 includes four side surfaces including a second Ught incident surface 810, a third surface 820 and a fourth surface 830.
- the four side surfaces connect the third side surface 820 to the fourth surfaces 820 and 830 of the second Ught guide plate 800.
- the fourth surface 830 has a shape same to that of the third surface 820.
- the second light incident surface 810 of the light guide plate 800 receives the fifth light 956 from the lamp 950.
- the fifth light 956 is changed into a sixth Ught 957 during passing through the second Ught incident surface 810.
- the third surface 820 reflects a portion of the sixth light 957 satisfied with the reflection condition of the refraction's law to the second display area 200.
- a remained portion of the sixth Ught 957 not satisfied with the reflection condition of the refraction's law is leaked to the second display area 200.
- the portion of the sixth Ught 957 reflected to the second display area 200 is defined as a seventh light 958 and the remained portion of the sixth Ught 957 transmitted to the first display area 100 is defined as a eighth Ught 959.
- the brightness control member 900 that is a reflecting plate 900 is disposed between the first and second light guide plates 700 and 800.
- the reflecting plate 900 has a sheet shape or a plate shape comprised of a PET resin.
- the reflecting plate 900 reflects the fourth Ught 955 leaked from the first surface 720 of the first light guide plate 700 to the first display area 100 and reflects the eighth Ught 959 leaked from the third surface 820 of the light guide plate 800 to the second display area 200.
- the first and fifth lights 952 and 956 emitted from the lamp 950 of the lamp assembly 940 are input to the first and second light incident surfaces 710 and 810 of the first and second light guide plate 700 and 800, respectively.
- the first Ught 952 is changed into the second Ught 953.
- the portion of the second Ught 953, which is satisfied with the reflection condition of the refraction's law, is reflected by the first surface 720 and provided to the first display area 100 through the second surface 730 as the third light 954.
- the remained portion of the second Ught 953, which is satisfied with the transmittal condition of the refraction's law, is supplied to the second display area 100 through the first surface 720 as the fourth light 955.
- the fifth light 956 emitted from the lamp ,950 of the lamp assembly 940 is changed into the sixth light 957.
- the portion of the sixth Ught 957 which is satisfied with the reflection condition of the refraction's law, is reflected by the third surface 820 and provided to the second display area 200 through the fourth surface 830 as the seventh Ught 958.
- the remained portion of the sixth Ught 957, which is not satisfied with the reflection condition of the refraction's law, is supplied to the first display area 100 through the third surface 820 as the eighth Ught 959.
- the third and seventh Ughts 954 and 958 are provided to the first and second display areas 100 and 200 through the first and second Ught guide plates 700 and 800.
- the fourth and eighth Ughts 954 and 959 are leaked into the first and second light guide plates 700 and 800.
- the fourth and eighth lights 955 and 959 are reflected form the reflecting plate 900 to provide the fourth and eighth Ughts 955 and 959 to the first and second display areas 100 and 200, respectively.
- the first surface 720 of the first Ught guide plate 700 is parallel to the second surface 730 thereof and the third surface 820 of the second light guide plate 800 is paraUel to the fourth surface 830. Also, the first light guide plate 700 has a size same to that of the second light guide plate 800.
- FIG. 8 is a schematic diagram showing a Ught reflecting pattern disposed on a light guide plate shown in FIG. 7.
- FIG. 9 is a schematic diagram showing optical sheets disposed on the backUght assembly shown in FIG. 8.
- the first Ught guide plate 700 includes a plurality of first light reflecting pads 721 disposed on the first surface 720 thereof and the second light guide plate 800 includes a plurality of second Ught reflecting pads 821 disposed on the third surface 820 thereof.
- the first and second Ught reflecting pads 721 and 821 are disposed in the matrix configuration.
- the backUght assembly 1000 shown in FIG. 7 may further include a first optical sheet 740 and a second optical sheet 840 as shown in FIG. 9.
- the first optical sheet 740 is disposed between the first display area 100 and the first Ught guide plate 700 and faces the second surface 730 of the first light guide plate 700.
- the first optical sheet 740 includes a body portion 742 having a plate shape and a brightness enhancing portion 744 for enhancing the brightness, which is disposed on a surface facing to the first surface 720.
- the brightness enhancing portion 744 is successively disposed on the body portion 742 and protruded from the body portion 742 to have a triangle shape in section.
- the second optical sheet 840 is disposed between the second display area 200 and the second Ught guide plate 800 and faces the fourth surface 830 of the second light guide plate 800.
- the second optical sheet 840 includes a body portion 842 having a plate shape and a brightness enhancing portion 844 for enhancing the brightness, which is disposed on a surface facing to the fourth surface 830.
- the brightness enhancing portion 844 is successively disposed on the body portion 842 and protruded from the body portion 842 to have a triangle shape in section.
- the first optical sheet 740 enhances optical properties such as a visual angle and a brightness distribution, etc., of the third light 954 and the portion of the eighth light 959.
- the second optical sheet 840 enhances optical properties such as the visual angle and the brightness distribution, etc., of the seventh light 958 and the portion of the fourth Ught 955.
- FIG. 10 is a schematic diagram showing a backlight assembly for emitting a light in two directions according to a fifth embodiment of the present invention.
- FIG. 11 is a graph showing a size of the Ught reflecting pattern shown in FIG. 10.
- FIG. 12 is a graph showing differences of the size between a first Ught reflecting pad and a second light reflecting pad shown in FIG. 10.
- the first and second light guide plates 700 and 800 may be formed to have sizes different to each other.
- the first Ught guide plate 700 has a size greater than that of the second Ught guide plate 800.
- the first Ught guide plate 700 includes a first Ught reflecting pad 725 disposed on the first surface 720 thereof and the second light guide plate 800 includes a second Ught reflecting pad 825 disposed on the third surface 820 thereof.
- the first light reflecting pad 725 disposed on the first surface 720 has a pattern different to that of the second light reflecting pad 825 disposed on the third surface 820.
- sizes of the first and second light reflecting pads 725 and 825 become larger according as the first and second Ught reflecting pads 725 and 825 are spaced more apart from the first and second Ught incident surface 710 and 810, respectively.
- the size of the first Ught reflecting pad 725 is not same to that of the second Ught reflecting pad 825.
- a rate of change of the size of the second Ught reflecting pad 825 based on a distance between the second light incident surface 810 and the second Ught reflecting pad 825 is greater than that of the first Ught reflecting pad 725 based on a distance between the first light incident surface 710 and the first Ught reflecting pad 725.
- a graph indicated by a reference “a” shows the rate of change of the size of the first Ught reflecting pad 725 and a graph indicated by a reference "b" shows the rate of change of the size of the second light reflecting pad 825.
- the first Ught reflecting pad 725 has a size "B” and the second Ught reflecting pad 825 has a size "C" greater than the size "B".
- FIG. 13 is a schematic diagram showing a backlight assembly for emitting a Ught in two directions according to a sixth embodiment of the present invention.
- FIG. 14 is a schematic diagram showing optical sheets disposed on the backUght assembly shown in FIG. 13.
- the first and second Ught guide plates 700 and 800 of the backlight assembly 1000 may have a wedge shape.
- a thickness between the first and second surfaces 720 and 730 of the first light guide plate 700 is thickest at the first light incident surface 710 and gradually becomes thinner according as the first and second surfaces 720 and 730 become more distant from the first Ught incident surface 710. That is, the first surface 720 is inclined toward the second surface 730.
- a thickness between the third and fourth surfaces 820 and 830 of the second Ught guide plate 800 graduaUy becomes thinner according as the first and second surfaces 820 and 830 become more close to the second light incident surface 810. That is, the third surface 820 is inclined toward the fourth surface 830 and is paraUel to the first surface 720.
- the first surface 720 of the first Ught guide plate 700 is parallel to the fourth surface 830 of the second light guide plate 800.
- the first Ught guide plate 700 includes a first Ught reflecting pad 721 disposed on the first surface 720 thereof and the second light guide plate 800 includes a second light reflecting pad 821 disposed on the third surface 820 thereof. Sizes of the first and second Hght reflecting pads 721 and 821 become larger according as the first and second light reflecting pads 721 and 821 are spaced more apart from the first and second Hght incident surface 710 and 810, respectively.
- the backlight assembly 1000 shown in FIG. 13 may further include a first optical sheet 740 and a second optical sheet 840 as shown in FIG. 14.
- the first optical sheet 740 is disposed between the first display area 100 and the first Ught guide plate 700 and faces the second surface 730 of the first Ught guide plate 700.
- the first optical sheet 750 includes a body portion 752 having a plate shape and a brightness enhancing portion 754 for enhancing the brightness, which is disposed on a surface facing to the first surface 720.
- the brightness enhancing portion 754 is successively disposed on the body portion 752 and protruded from the body portion 752 to have a triangle shape in section.
- the second optical sheet 840 is disposed between the second display area 200 and the second Ught guide plate 800 and faces the fourth surface 830 of the second light guide plate 800.
- the second optical sheet 850 includes a body portion 852 having a plate shape and a brightness enhancing portion 854 for enhancing the brightness, which is disposed on a surface facing to the fourth surface 830.
- the brightness enhancing portion 854 is successively disposed on the body portion 852 and protruded from the body portion 852 to have a triangle shape in section.
- the first optical sheet 740 enhances optical properties such as a visual angle and a brightness distribution, etc., of the third Ught 954 and the portion of the eighth light 959.
- FIG. 15 is a schematic diagram showing a backUght assembly for emitting a light in two directions according to a seventh embodiment of the present invention.
- FIG. 16 is a graph showing a size of the light reflecting pattern shown in FIG. 15.
- FIG. 17 is a graph showing differences of the size between a first Hght reflecting pad and a second light reflecting pad shown in FIG. 15.
- the first and second light guide plates 700 and 800 may be formed to have sizes different to each other.
- the first Ught guide plate 700 includes a first Ught reflecting pad 721 disposed on the first surface 720 thereof and the second light guide plate 800 includes a second Ught reflecting pad 822 disposed on the third surface 820 thereof.
- sizes of the first and second light reflecting pads 721 and 822 become larger according as the first and second Ught reflecting pads 721 and 822 are spaced more apart from the first and second light incident surface 710 and 810, respectively.
- the size of the first light reflecting pad 721 is not same to that of the second Ught reflecting pad 822.
- a rate of change of the size of the second light reflecting pad 822 based on a distance between the second Hght incident surface 810 and the second light reflecting pad 822 is greater than that of the first Ught reflecting pad
- a graph indicated by a reference “a” shows the rate of change of the size of the first Ught reflecting pad 721 and a graph indicated by a reference “b” shows the rate of change of the size of the second Ught reflecting pad 822.
- FIG. 18 is a schematic diagram showing a backUght assembly for emitting a light in two directions according to an eighth embodiment of the present invention.
- the backlight assembly 1000 may further include a first optical sheet 760 and a second optical sheet 860.
- the first optical sheet 760 is disposed between the first display area 100 and the first Ught guide plate 700 and faces the second surface 730.
- the first optical sheet 760 includes a body portion 762 having a plate shape and a brightness enhancing portion 764 for enhancing the brightness, which is disposed on a surface facing to the first surface 720.
- the brightness enhancing portion 764 is successively disposed on the body portion 762 and protruded from the body portion 762 to have a triangle shape in section.
- the second optical sheet 860 is disposed between the second display area 200 and the second Ught guide plate 800 and faces the fourth surface 830.
- the second optical sheet 760 includes a body portion 762 having a plate shape and a brightness enhancing portion 764 for enhancing the brightness, which is disposed on a surface facing to the first surface 720.
- the brightness enhancing portion 764 is successively disposed on the body portion 762 and protruded from the body portion 762 to have a triangle shape in section.
- FIG. 19 is a schematic diagram showing an LCD apparatus according to a first embodiment of the present invention.
- FIGS. 20 to 23 are schematic diagrams showing sizes and locations of a first LCD panel assembly and a second LCD panel assembly shown in FIG. 19.
- an LCD apparatus 1300 includes a first LCD panel assembly 1100, a second LCD panel assembly 1200 and the backlight assembly 500 shown in FIG. 1.
- the first LCD panel assembly 1100 is disposed on the first display area 100.
- the first LCD panel assembly 1100 receives the third Ught 325 emitted from the first light emitting surface 320 and the portion of the fourth Hght 335 reflected from the brightness control member 400 and emits a first display light 1110 having image information.
- the second LCD panel assembly 1200 is disposed on the second display area
- the second LCD panel assembly 1200 receives a light passed through the brightness control member 400 of the fourth light 335 emitted from the second light emitting surface 330 and emits a second display light 1210 having image information.
- the first and second LCD panel assemblies 1100 and 1200 have a first display area and a second display area, respectively.
- the first and second display areas are same to each other.
- first LCD panel assembly 1100 may have a first display area different to the second display area of a second LCD panel assembly 1250 as shown in FIG. 20.
- the first display area of the first LCD panel assembly 1100 is greater than the second display area of the second LCD panel assembly 1250.
- a driving module may be disposed at a surplus space of the second LCD panel assembly 1250. Therefore, the volume of the second LCD panel assembly 1250 may be reduced.
- the second LCD panel assembly 1250 may be disposed parallel to the second light emitting surface 332. Thus, it is able to reduce the thickness of the LCD apparatus in total.
- optical properties of the second LCD panel assembly 1250 depend on a position of the second LCD panel assembly 1250.
- a reference numeral 1252 indicates a first end portion of the second LCD panel assembly 1250 and a reference numeral 1254 indicates a second end portion opposite to the first end portion.
- the first end portion 1252 of the second LCD panel assembly 1250 is aligned to the light incident surface 310 of the light guide plate 300. Where the first end portion 1252 is aligned to the light incident surface 310, the second LCD panel assembly 1250 may obtain a lot of light than where the first end portion 1252 is not aligned to the light incident surface 310. Also, the second LCD panel assembly 1250 may be disposed at a center portion with respect to the second light emitting surface 330 as shown in FIG. 21. Further, the second end portion 1254 of the second LCD panel assembly 1250 may be aligned to an end portion 410 of the brightness control member 400.
- FIGS. 24 and 25 are schematic diagrams showing driving methods of the first and second LCD panel assemblies shown in FIG. 19.
- At least one of the first and second LCD panel assemblies 1100 and 1200 shown in FIG. 19 may be operated by a passive matrix method without using a thin film transistor.
- the passive matrix method is a manner that generates an electric field for controlling the liquid crystal using a driving signal applying part 1300 after injecting a liquid crystal between a first electrode 1310 and a second electrode 1320 intersected with the first electrode 1310.
- the first LCD panel assembly 1100 Since the first LCD panel assembly 1100 is operated by the driving signal applying part 1300 same to that for operating the second LCD panel assembly 1200, the first LCD panel assembly 1100 displays an image same to that displayed through the second LCD panel assembly 1200.
- the first and second LCD panel assemblies 1100 and 1200 may include a first driving module for generating a first driving signal and a second driving module for generating a second driving signal, respectively.
- the first LCD panel assembly 1100 displays a first image
- the second LCD panel assembly 1200 displays a second image.
- at least one of the first and second LCD panel assemblies 1100 and 1200 shown in FIG. 19 may be operated by an active matrix method.
- the active matrix method is a manner that uses a thin film transistor 1400 and a pixel electrode 1450 receiving a power from the thin film transistor 1400 and generates an electric field for controlling the liquid crystal using a driving signal applying part 1470.
- the first LCD panel assembly 1100 Since the first LCD panel assembly 1100 is operated by the driving signal applying part 1470 same to that for operating the second LCD panel assembly 1200, the first LCD panel assembly 1100 displays an image same to that displayed through the second LCD panel assembly 1200.
- the first and second LCD panel assemblies 1100 and 1200 may include a first driving module for generating a first driving signal and a second driving module for generating a second driving signal, respectively.
- the first LCD panel assembly 1100 displays a first image
- the second LCD panel assembly 1200 displays a second image.
- FIG. 26 is a schematic diagram showing an LCD apparatus according to a second embodiment of the present invention.
- FIG. 27 is a schematic diagram showing sizes and locations of a first LCD panel assembly and a second LCD panel assembly shown in FIG. 26.
- an LCD apparatus 1700 includes a first LCD panel assembly 1500, a second LCD panel assembly 1600 and the backlight assembly 1000 shown in FIG. 7.
- the first LCD panel assembly 1500 is disposed on the first display area 100.
- the first LCD panel assembly 1500 receives the third light 954 emitted from the second surface 730 and the portion of the fourth light 955 reflected from the brightness control member 900 and emits a first display light 1510 having image information.
- the second LCD panel assembly 1600 is disposed on the second display area 200.
- the second LCD panel assembly 1600 receives a light passed through the brightness control member 900 of the eighth light 959 emitted from the third surface 830 and emits a second display light 1610 having image information.
- the first and second LCD panel assemblies 1500 and 1600 have a first display area and a second display area, respectively. The first and second display areas are same to each other.
- first LCD panel assembly 1500 may have a first display area different to the second display area of a second LCD panel assembly 1600 as shown in FIG. 27.
- the first display area of the first LCD panel assembly is the first display area of the first LCD panel assembly
- optical properties of the second LCD panel assembly 1600 depend on a position of the second LCD panel assembly 1600.
- a reference numeral 1620 indicates a first end portion of the second LCD panel assembly 1600 and a reference numeral 1640 indicates a second end portion opposite to the first end portion.
- the first end portion 1620 of the second LCD panel assembly 1600 is aligned to the light incident surface 810 of the second light guide plate 800. Where the first end portion 1620 is aligned to the light incident surface 810, the second LCD panel assembly 1600 may obtain a lot of light than where the first end portion 1620 is not aligned to the light incident surface 810. Also, the second LCD panel assembly 1600 may be disposed at a center portion with respect to the second light emitting surface 830 as shown in FIG. 27. Further, the second end portion 1640 of the second LCD panel assembly 1600 may be aligned to an end portion 910 of the brightness control member 900. At least one of the first and second LCD panel assemblies 1500 and 1600 shown in FIG. 26 may be operated by a passive matrix method without using a thin film transistor. The passive matrix method is a manner that generates an electric field for controlling the liquid crystal using a driving signal applying part 1300 after injecting a liquid crystal between a first electrode 1310 and a second electrode 1320 intersected with the first electrode 1310.
- the first LCD panel assembly 1500 Since the first LCD panel assembly 1500 is operated by the driving signal applying part 1300 same to that for operating the second LCD panel assembly 1200, the first LCD panel assembly 1500 displays an image same to that displayed through the second LCD panel assembly 1600.
- the first and second LCD panel assemblies 1500 and 1600 may include a first driving module for generating a first driving signal and a second driving module for generating a second driving signal, respectively.
- the first LCD panel assembly 1500 displays a first image
- the second LCD panel assembly 1600 displays a second image.
- At least one of the first and second LCD panel assemblies 1500 and 1600 shown in FIG. 26 may be operated by an active matrix method.
- the active matrix method is a manner that uses a thin film transistor 1400 and a pixel electrode 1450 receiving a power from the thin film transistor 1400 and generates an electric field for controlling the liquid crystal using a driving signal applying part 1470.
- the first LCD panel assembly 1500 Since the first LCD panel assembly 1500 is operated by the driving signal applying part 1470 same to that for operating the second LCD panel assembly 1600, the first LCD panel assembly 1500 displays an image same to that displayed through the second LCD panel assembly 1600.
- the first and second LCD panel assemblies 1500 and 1600 may include a first driving module for generating a first driving signal and a second driving module for generating a second driving signal, respectively.
- the first LCD panel assembly 1500 displays a first image
- the second LCD panel assembly 1600 displays a second image.
- the LCD apparatus may display images in the two directions, which are same to each other or different to each other. Where the images are different to each other, the LCD apparatus may display the images to have a first and a second brightness that are different to each other, using the brightness control member. Thus, a user may obtain various images through the LCD apparatus.
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Planar Illumination Modules (AREA)
- Liquid Crystal (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/504,613 US7237939B2 (en) | 2002-04-16 | 2003-02-20 | Backlight assembly and liquid crystal display apparatus using the same |
AU2003212658A AU2003212658A1 (en) | 2002-04-16 | 2003-02-20 | Backlight assembly for liquid crystal display apparatus |
JP2003586657A JP4191052B2 (ja) | 2002-04-16 | 2003-02-20 | 両方向光出射バックライト組立体及びこれを用いる液晶表示装置 |
US11/675,703 US20070139966A1 (en) | 2002-04-16 | 2007-02-16 | Backlight assembly for liquid crystal display apparatus |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR20020020568 | 2002-04-16 | ||
KR10-2002-0020568 | 2002-04-16 | ||
KR1020020072040A KR100897738B1 (ko) | 2002-04-16 | 2002-11-19 | 양방향 광출사 백라이트 어셈블리, 이를 이용한액정표시장치 |
KR10-2002-0072040 | 2002-11-19 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/675,703 Continuation US20070139966A1 (en) | 2002-04-16 | 2007-02-16 | Backlight assembly for liquid crystal display apparatus |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2003089980A1 true WO2003089980A1 (fr) | 2003-10-30 |
Family
ID=29253717
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/KR2003/000348 WO2003089980A1 (fr) | 2002-04-16 | 2003-02-20 | Ensemble panneau lumineux destine a un appareil d'affichage a cristaux liquides |
Country Status (5)
Country | Link |
---|---|
US (2) | US7237939B2 (fr) |
JP (1) | JP4191052B2 (fr) |
CN (1) | CN100416373C (fr) |
AU (1) | AU2003212658A1 (fr) |
WO (1) | WO2003089980A1 (fr) |
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ITMI20092074A1 (it) * | 2009-11-25 | 2011-05-26 | Cross Point S R L | Dispositivo di illuminazione conformato a pannello a spessore ridotto ed elevata uniformita' di emissione superficiale |
WO2012139981A1 (fr) * | 2011-04-11 | 2012-10-18 | Plastic Logic Limited | Dispositifs d'affichage réfléchissants |
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CN105223731A (zh) * | 2015-10-20 | 2016-01-06 | 深圳市华星光电技术有限公司 | 双面液晶显示装置及其背光模块 |
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- 2003-02-20 US US10/504,613 patent/US7237939B2/en not_active Expired - Lifetime
- 2003-02-20 AU AU2003212658A patent/AU2003212658A1/en not_active Abandoned
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- 2007-02-16 US US11/675,703 patent/US20070139966A1/en not_active Abandoned
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US4693560A (en) * | 1986-09-25 | 1987-09-15 | Taliq Corporation | Double layer display |
GB2247977A (en) * | 1990-09-12 | 1992-03-18 | Smiths Industries Plc | Display assemblies |
JPH09243988A (ja) * | 1996-03-14 | 1997-09-19 | Hitachi Ltd | ディスプレイ装置、ビデオゲーム装置、モニタ装置および情報処理装置 |
EP0881617A1 (fr) * | 1997-05-26 | 1998-12-02 | Nokia Mobile Phones Ltd. | Agencement d'affichage double et dispositif terminal |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1571486A1 (fr) * | 2004-02-25 | 2005-09-07 | Citizen Electronics Co., Ltd. | Dispositif d'illumination double-face |
EP1954982A1 (fr) * | 2005-11-30 | 2008-08-13 | Showa Denko K.K. | Element guide de lumiere, dispositif source de lumiere plan dote de cet element guide de lumiere et appareil d affichage utilisant ce dispositif source de lumiere plan |
EP1954982A4 (fr) * | 2005-11-30 | 2011-11-30 | Showa Denko Kk | Element guide de lumiere, dispositif source de lumiere plan dote de cet element guide de lumiere et appareil d affichage utilisant ce dispositif source de lumiere plan |
ITMI20092074A1 (it) * | 2009-11-25 | 2011-05-26 | Cross Point S R L | Dispositivo di illuminazione conformato a pannello a spessore ridotto ed elevata uniformita' di emissione superficiale |
WO2012139981A1 (fr) * | 2011-04-11 | 2012-10-18 | Plastic Logic Limited | Dispositifs d'affichage réfléchissants |
GB2502494A (en) * | 2011-04-11 | 2013-11-27 | Plastic Logic Ltd | Reflective display devices |
US9647176B2 (en) | 2011-04-11 | 2017-05-09 | Flexenable Limited | Reflective display devices |
GB2502494B (en) * | 2011-04-11 | 2017-07-19 | Flexenable Ltd | Reflective display devices |
Also Published As
Publication number | Publication date |
---|---|
JP4191052B2 (ja) | 2008-12-03 |
US20070139966A1 (en) | 2007-06-21 |
JP2005523562A (ja) | 2005-08-04 |
US20050117368A1 (en) | 2005-06-02 |
AU2003212658A1 (en) | 2003-11-03 |
US7237939B2 (en) | 2007-07-03 |
CN1646974A (zh) | 2005-07-27 |
CN100416373C (zh) | 2008-09-03 |
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